JEWELRY MEASUREMENTS
Ring Size guide
Sizing can be tricky. If your knuckle's larger than the base of your finger, split the difference between two sizes. You need a fit that slides on smoothly but stays put. So, take two measurements and meet somewhere in the middle.
US Ring Size
2
2.5
3
3.5
4
4.5
5
5.5
6
6.5
7
Inner Diameter (mm)
13.3
13.7
14.1
14.5
14.9
15.3
15.7
16.1
16.5
16.9
17.3